Modular smart home device with a battery case



FIG. 1 is front perspective view showing a modular smart home device with a battery case;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a rear view thereof.

The broken lines in the drawings depict portions of the modular smart home device with a battery case that form no part of the claimed design. 

CLAIM The ornamental design for a modular smart home device with a battery case, as shown and described. 